On Fri, May 04, 2001 at 02:03:35PM -0700, Adam Radford wrote:
> Larry,
>
> If there's anything to fix in the driver for this problem I'd be interested,
> however I have not seen this problem before.
>
> What benchmark (and options) are you running? bonnie++ ?
>
> BTW... I am the author of the
And yet more data -
Under 2.2.15 using 3ware's driver rather than the one shipped with the
kernel, one complete read goes at 35MB/sec (nice). The second one starts
out there and then drops down to 4MB/sec at the 1.2GB offset.
Here's the cool part - if I unmount, rmmod the driver, insmod,
More data:
the test file is 2GB in size.
When I do a reboot and time the reading of the entire file,
the first time the performance is great, 27MB.
The second time it sucks, 2.7MB.
I tried clearing memory by allocating and pounding on an array of 512MB
(size of main mem), that clears out memory
I'm looking for people who know about the 3ware 6410 driver. I've got one
of these and sometimes it goes fast and sometimes it doesn't. The bad
case seems to happen after memory has a lot of cached blocks in it.
I've tried 2.2.15, 2.4.4, and 2.4.3-ac9 and they all behave pretty similarly.
I'm looking for people who know about the 3ware 6410 driver. I've got one
of these and sometimes it goes fast and sometimes it doesn't. The bad
case seems to happen after memory has a lot of cached blocks in it.
I've tried 2.2.15, 2.4.4, and 2.4.3-ac9 and they all behave pretty similarly.
More data:
the test file is 2GB in size.
When I do a reboot and time the reading of the entire file,
the first time the performance is great, 27MB.
The second time it sucks, 2.7MB.
I tried clearing memory by allocating and pounding on an array of 512MB
(size of main mem), that clears out memory
And yet more data -
Under 2.2.15 using 3ware's driver rather than the one shipped with the
kernel, one complete read goes at 35MB/sec (nice). The second one starts
out there and then drops down to 4MB/sec at the 1.2GB offset.
Here's the cool part - if I unmount, rmmod the driver, insmod,
On Fri, May 04, 2001 at 02:03:35PM -0700, Adam Radford wrote:
Larry,
If there's anything to fix in the driver for this problem I'd be interested,
however I have not seen this problem before.
What benchmark (and options) are you running? bonnie++ ?
BTW... I am the author of the Linux
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